Urban assessments were conducted in only six countries, with most records concentrated in residential, commercial, and recreational zones [84,85,86], whereas institutional areas, relic sites, and university campuses were rarely sampled [57, 59] (Table S3)
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Reynolds, said in an emailed statement
After it develops into cancer If a sore develops into cancer, you may notice the following: Patches on the lining of your mouth or tongue, usually red or red and white Bleeding, pain, or numbness in your mouth Persistent sores on your face, neck, or mouth that bleed easily and do not heal within two weeks A lump or thickening in your gums or the lining of your mouth Loose teeth for no apparent reason Swelling of your jaw Chronic sore throat or a feeling that something is stuck in your throat Hoarseness or a change in your voice Difficulty chewing, swallowing, speaking, or moving your jaw or tongue A change in the way your teeth or dentures fit together Significant weight loss It should be noted that the presence of any of these symptoms does not mean that the patient has oral cancer, but it is worth seeing a doctor